[PATCH] D14700: [mips][freebsd] Explicitly select PC-relative Personality and LSDA encodings.

[Daniel Sanders via llvm-commits]

> -----Original Message-----
> From: Rafael Espíndola [mailto:rafael.espindola at gmail.com]
> Sent: 16 November 2015 21:12
> To: reviews+D14700+public+694feb8b7227989b at reviews.llvm.org; Daniel
> Sanders
> Cc: llvm-commits; Sean Bruno
> Subject: Re: [PATCH] D14700: [mips][freebsd] Explicitly select PC-relative
> Personality and LSDA encodings.
> 
> > Given the choice I'd prefer to change the Linux encodings to match
> FreeBSD at some point in the future. MIPS Linux seems to be the only target
> that has to ask for absolute encodings in order to get pc-relative encodings.
> 
> Can we do it now? I.E, always ask for pc relative?
> 
> Cheers,
> Rafael

Not yet. The Linux toolchains reject it with 'Error: invalid or unsupported encoding in .cfi_personality' and similar. As things stand, we need GAS changes to fix this properly but once IAS is enabled by default* and stable we'll be able to ignore GAS's behaviour for most (hopefully all) toolchains. That said, we'll want to keep -fno-integrated-as working (at least for a while).

* We're pretty close to enabling IAS for the O32 ABI at this point. We fail a couple 'ninja check' tests and LLVMLinux has a few minor issues but compiler recursion works nicely. I doubt N64 will be far behind but enabling IAS for that is closely tied to N32 which is badly broken until the MCTargetMachine work makes fixes possible.